mesa: only include ctype.h where it's used

Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Jose Fonseca <jfonseca@vmware.com>

src/glsl/linker.cpp

@@ -64,6 +64,7 @@
  * \author Ian Romanick <ian.d.romanick@intel.com>
  */
 
+#include <ctype.h>
 #include "main/core.h"
 #include "glsl_symbol_table.h"
 #include "glsl_parser_extras.h"

src/mesa/main/compiler.h

@@ -35,7 +35,6 @@
 
 
 #include <assert.h>
-#include <ctype.h>
 #include <math.h>
 #include <limits.h>
 #include <stdlib.h>